Tachographs are devices installed on certain types of vehicles, which record the speed, time and distance traveled by that vehicle. It is mainly used in public transport and cargo transport vehicles, thus helping to prevent speed abuses by drivers.
The company SBC (Sociedade Brasileira dos Caminhoneiros) decided to order a slightly more basic (and cheaper) version so that its members do not have to spend so much on installing these devices. These modified versions record only the time intervals and average truck speeds at those intervals.
Despite the restrictions of the new devices, SBC wants to be able to know how far the trucks traveled. You must write a program that receives a series of time intervals with their respective average speeds and calculates the total distance traveled by the truck according to the tachograph.
Input
The first line of the entry contains an integer N (1 ≤ N ≤ 1000) representing the number of time intervals recorded on the tachograph. The next N lines describe the time intervals. Each of these lines has two integers T and V (1 ≤ T ≤ 100, 0 ≤ V ≤ 120), which represent, respectively, the elapsed time (in hours) and the average speed (in kilometers per hour) in the time interval.
Output
Your program should print a single line, containing a single integer representing the total distance traveled, in kilometers.
Entry Examples | Output Examples |
3 10 0 55 12 75 120 | 9660 |
10 45 46 46 101 7 2 95 104 12 107 78 29 10 26 52 86 13 79 1 107 | 26022 |
8 37 24 68 69 28 26 79 8 36 0 50 71 13 68 87 113 | 21205 |
URI 2388 Solution in Python:
N = int(input())
S = 0
while N>0:
T, V = map(int,input().split())
S = S + (T*V)
N -=1
print(S)
Comments
Post a Comment